A headlamp aim advisory means the tester noted the aim without it being outside the limits. Headlamp aim outside the limits is a major defect and an automatic fail, as is aim that cannot be tested or an obviously incorrect beam image.
Checked 23 October 2026 against the DVSA MOT inspection manual
- Aim outside limits: Major defect
- Aim cannot be tested: Major defect
- Minor category: None for aim
- DVSA manual: 4.1.2
What this advisory means
An advisory is used when an item is not deteriorated enough to justify a fail, to inform the presenter. Advisories do not cause a fail and are recorded in the MOT history.
Headlamp aim outside the limits is a major defect (DVSA manual 4.1.2 a), as is aim that cannot be tested (4.1.2 b) or an obviously incorrect beam image (4.1.2 c). There is no minor category for headlamp aim, so an aim fault is either noted as an advisory or fails the test.
The distinction matters because the outcome is recorded against the vehicle. A major defect under 4.1.2 means the test is failed. The MOT history will show which applied, giving a clear record of the headlamp aim at the time of inspection.
When it becomes an MOT fail
Headlamp aim moves from an advisory to a failure when the aim falls outside the permitted limits. The DVSA inspection manual lists this as a major defect at 4.1.2 a. The same outcome applies where the aim cannot be tested at all, covered at 4.1.2 b, and where the beam image is obviously incorrect, covered at 4.1.2 c. Each of these conditions is recorded as a major defect rather than an advisory.
The manual contains no minor category for headlamp aim. This means an aim fault is either noted as an advisory or results in a test failure. There is no middle grading between the two outcomes. Where the condition meets one of the defect descriptions at 4.1.2 a, 4.1.2 b or 4.1.2 c, the result is a major defect and the vehicle fails the MOT test.
The distinction rests on the specific condition found at inspection. Aim outside the limits, an untestable aim or an obviously incorrect beam image each trigger the major defect reference. An advisory is used only where the aim does not meet those defect descriptions. The manual references at 4.1.2 a, 4.1.2 b and 4.1.2 c set out the exact conditions that turn the advisory into a major defect.
| DVSA manual ref | Defect | Result |
|---|---|---|
| 4.1.2 (a) | Headlamp aim not within limits | Major |
| 4.1.2 (b) | Headlamp aim unable to be tested | Major |
| 4.1.2 (c) | Beam image obviously incorrect | Major |
Source: DVSA manual section 4: lamps, checked 23 October 2026.
Frequently asked questions
What is an MOT advisory?
An advisory is used when an item is not deteriorated enough to justify a fail, to inform the presenter. Advisories do not cause a fail and are recorded in the MOT history.
Does an advisory for headlamp aim mean the vehicle has failed?
No. An advisory does not cause a fail. It is recorded in the MOT history to inform the presenter about the headlamp aim, which was not outside the limits.
When does headlamp aim become a major defect?
Headlamp aim outside the limits is a major defect under DVSA manual 4.1.2 a. Aim that cannot be tested is a major defect under 4.1.2 b, and an obviously incorrect beam image is a major defect under 4.1.2 c.
Is there a minor category for headlamp aim?
No. There is no minor category for headlamp aim, so an aim fault is either noted as an advisory or fails the test. The outcome depends on whether the aim is outside the limits or cannot be tested.
Where is a headlamp aim advisory recorded?
An advisory for headlamp aim is recorded in the MOT history. It informs the presenter of the fault without causing a fail, and it remains visible on the vehicle record.
Part of the MOT guide series
